This Fixed Dual-Sided VentedShelf is designed for use in standard open frame 2-post floor racks and is vented for better air flow. It is a two-piece design which mounts from front and back of rack and is available in two sizes with an 18 inches and 25 inches depth. They come complete with a set of #12-24 mounting screws and has a black powdercoat microfinish to match rack color.